The $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state: Y(4260) or Y(4660)?

Abstract

The mass of $P$-wave $cs$-scalar-diquark $\bar{c}\bar{s}$-scalar-antidiquark state is computed in the framework of QCD sum rules. The result $4.69\pm 0.36GeV$ is in good agreement with the experimental value of Y(4660) but higher than Y(4260)'s, which supports the $P$-wave $[cs][\bar{c}\bar{s}]$ configuration for Y(4660) while disfavors the interpretation of Y(4260) as the $P$-wave $[cs][\bar{c}\bar{s}]$ state. In the same picture, the mass of $P$-wave $[bs][\bar{b}\bar{s}]$ is predicted to be $11.19\pm 0.49GeV$.

Variations of continuum thresholds have been enlarged following the Referee's suggestions; the revised version accepted for publication in PRD; 7 pages 6 figures

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• Analysis of the hidden-charm tetraquark mass spectrum with the QCD sum rules
• Investigating possible decay modes of $Y(4260)$ under the $D_1(2420)\bar{D}+c.c$ molecular state ansatz
• Strong decays of the $Y(4660)$ as a vector tetraquark state in solid quark-hadron duality
• Lowest vector tetraquark states: $Y(4260/4220)$ or $Z_c(4100)$
• Are the $Y$ states around 4.6 GeV from $e^{+}{e}^{-}$ annihilation higher charmonia?
• Vector tetraquark state candidates: $Y(4260/4220)$, $Y(4360/4320)$, $Y(4390)$ and $Y(4660/4630)$
• Analysis of the vector tetraquark states with P-waves between the diquarks and antidiquarks via the QCD sum rules
• Resonance $Y(4660)$ as a vector tetraquark and its strong decay channels
• New molecular candidates: X(1910), X(2200), and X(2350)
• A novel explanation of charmonium-like structure in $e^{+}{e}^{-}\to \psi (2S){\pi }^{+}{\pi }^{-}$
• A new decay mode of higher charmonium
• Search for $Z_{s1}^{+}$ and $Z_{s2}^{+}$ strangeonium-like structures
• $Y(4626)$ as a $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state
• Study of the $Y(4660)$ from a light-quark perspective
• Charmonium decays into ${\Lambda }_c{\bar{\Lambda }}_c$ pair governed by the hadronic loop mechanism
• $D$-wave excited $cs\bar{c}\bar{s}$ tetraquark states with $J^{PC}=1^{++}$ and $1^{+-}$
• Coupled-channel study of $4S$-$3D$ mixing dynamics in $\psi (4220)$ and $\psi (4380)$
• Three-body strong decays of the $Y(4230)$ via the light-cone QCD sum rules
• Study of the $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\omega$ process at center-of-mass energies between 4.0 and 4.6 GeV
• Two-body strong decays of the hidden-charm tetraquark molecular states via the QCD sum rules
• Two-body strong decays of the pseudoscalar hidden-charm tetraquark states via the QCD sum rules
• Pinpointing Physical Solutions in Y(4230) Decays
• The scalar and pseudoscalar hidden-charm tetraquark states with QCD sum rules